When someone parked their little white Van 
without the Emergency Brake "ON"
and  it went swimming in the Harbor, 
they called a Big Red Truck to lift it out . . .
 
 

But the Big Red Truck slipped in 
on top of the Little White Van !
 
 
 
 

So they called a BIG GREEN TRUCK
to lift out the Big Red Truck and the Little White Van...
 
 
 
 

They loaded the Little White Van on a Red Tow Truck to take it home.
But the Big Red Truck got jammed against the bank . . .
 
 
 
 

. . .and pulled the BIG GREEN TRUCK in on top of the Big Red Truck.
 
 

Which brings to mind the saying:

"90% of Professionals graduated in the bottom 90% of their class" - N.H.